RF simplex spread spectrum receiver and method with symbol deinterleaving prior to bit estimating

A receiver for receiving a biorthogonally modulated signal including selection and polarity bits, the receiver comprising:

• first and second correlators for determining one of:
• (i) correlation sums and (ii) functions of correlation sums, from the received biorthogonally modulated signal;
• a symbol deinterleaver for symbol deinterleaving the correlation sums or the functions thereof;
• a comparing device for determining selection bit estimates from symbol deinterleaved signals;
• and
• first and second polarity guantizers for determining polarity bit estimates from symbol deinterleaved signals.

A receiver for receiving a biorthogonally modulated signal including selection and polarity bits, the receiver comprising:

• first and second correlators for determining one of:
• (i) correlation sums and (ii) functions of correlation sums, from the received biorthogonally modulated signal;
• a symbol deinterleaver for symbol deinterleaving the correlation sums or the functions thereof;
• a comparing device for determining selection bit estimates from symbol deinterleaved signals;
• and
• wherein said comparing device includes normalized comparison metric means.

A receiver for receiving biorthogonally modulated signals including selection and polarity bits, the receiver comprising:

• correlation means for determining one of:
• (i) correlation sums and (ii) functions of correlation sums, of received biorthogonally modulated signals;
• a symbol deinterleaver for symbol deinterleaving the correlation sums or the functions thereof;
• means for determining polarity bit estimates using symbol deinterleaved signals;
• and
• a multi-step decoder for decoding and then re-encoding estimated selection bits using an error correction code in order to estimate received polarity bits.

A method of receiving and processing a biorthogonally modulated signal, the method comprising the steps of:

• receiving the biorthogonally modulated signal;
• determining first and second correlation sums;
• adding the first and second correlation sums together and then quantizing the resulting sum so as to determine a quantized sum;
• determining a difference between the first and second correlation sums so as to determine a sum difference;
• symbol deinterleaving each of the quantized sum and the sum difference;
• and
• determining polarity and selection bit estimates using the symbol deinterleaved correlation sum signals.